UNIT 8 TEST 2A. THERE WERE NO ANSWERS B. THERE WERE NO ANSWERI. PRONUN...

50. He/ help/ his friend/ get good mark/ explain/ lessons/ carefully//_______________________________________________________B. Read the passage carefully, then choose the correct answer.In an early survey conducted in 1888, a billion and a half people inhabitedthe earth. Now, the population is about six billion and is growing fast. Eventhough the rate of growth has begun to slow down, most people believe thepopulation size may be eight billion during the next several years.If we examine the amount of land available for this ever increasingpopulation, we begin to see the problem. Not all land is useful to us because itcannot produce food. We can cut out about one fifth of it because it is coveredby snow and ice. Then we can cut out another fifth because it is desert. Anotherfifth is mountains. The other fifth does not have enough soil for crops to growbecause it is bare rock. Obviously, with so little land to support us, we shouldtake great care not to reduce it any more or with the rapidly growing populationwe may sooner or later lack food to eat and place to live in.